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Retirement Benefits (Tables)
6 Months Ended
Jun. 30, 2014
Retirement Benefits Pension And Postretirement [Line Items]  
Schedule Of Net Benefit Costs [Table Text Block]
   U.S. Plans Non-U.S. Plans Total 
 (In millions) 2014 2013 2014 2013 2014 2013 
               
 Three months ended June 30,             
               
 Service cost$ -  -  3.2  3.8  3.2  3.8 
 Interest cost on projected benefit obligation  11.3  10.5  4.6  4.8  15.9  15.3 
 Return on assets – expected  (16.2)  (14.3)  (3.8)  (3.2)  (20.0)  (17.5) 
 Amortization of losses  7.0  11.4  0.6  1.5  7.6  12.9 
 Amortization of prior service cost  -  -  0.2  (0.1)  0.2  (0.1) 
 Settlement loss   -  -  1.1  0.5  1.1  0.5 
 Net periodic pension cost$ 2.1  7.6  5.9  7.3  8.0  14.9 
               
 Six months ended June 30,             
               
 Service cost$ -  -  6.7  7.4  6.7  7.4 
 Interest cost on projected benefit obligation  22.7  21.1  10.4  9.6  33.1  30.7 
 Return on assets – expected  (31.6)  (28.5)  (7.6)  (6.4)  (39.2)  (34.9) 
 Amortization of losses  14.2  22.7  1.1  3.1  15.3  25.8 
 Amortization of prior service cost  -  -  0.4  0.5  0.4  0.5 
 Settlement loss   -  -  1.8  0.8  1.8  0.8 
 Net periodic pension cost$ 5.3  15.3  12.8  15.0  18.1  30.3 
Schedule of Costs of Retirement Plans [Table Text Block]
    UMWA Plans Black Lung and Other Plans Total 
 (In millions) 2014 2013 2014 2013 2014 2013 
                
 Three months ended June 30,             
                
 Service cost$ -  -  0.1  0.1  0.1  0.1 
 Interest cost on accumulated postretirement benefit obligations  4.4  4.9  0.4  0.5  4.8  5.4 
 Return on assets – expected  (5.6)  (5.2)  -  -  (5.6)  (5.2) 
 Amortization of losses   2.9  4.8  0.1  0.2  3.0  5.0 
 Amortization of prior service (credit) cost  (1.2)  -  0.5  0.4  (0.7)  0.4 
 Net periodic postretirement cost$ 0.5  4.5  1.1  1.2  1.6  5.7 
                
 Six months ended June 30,             
                
 Service cost$ -  -  0.1  0.2  0.1  0.2 
 Interest cost on accumulated postretirement benefit obligations  9.2  9.9  1.0  1.0  10.2  10.9 
 Return on assets – expected  (11.2)  (10.4)  -  -  (11.2)  (10.4) 
 Amortization of losses  6.6  9.8  0.3  0.3  6.9  10.1 
 Amortization of prior service (credit) cost  (2.3)  -  0.9  0.8  (1.4)  0.8 
 Net periodic postretirement cost$ 2.3  9.3  2.3  2.3  4.6  11.6